Hi Vamsi,
could post more details of the used OJB version and how you are using
OJB? Could it be a concurrency issue, is it guaranteed that each thread
use it's own PB instance?
regards,
Armin
Vamsi Atluri wrote:
Hello all,
I am getting this error when I am doing a broker.getCollectionByQuery() very intermittently. The same piece of code works some times and fails some times with this error:
[5/11/06 10:02:15:498 EDT] 24df24df SystemErr R java.lang.NullPointerException
[5/11/06 10:02:15:498 EDT] 24df24df SystemErr R at java.lang.Throwable.(Throwable.java)
[5/11/06 10:02:15:498 EDT] 24df24df SystemErr R at java.lang.Throwable.(Throwable.java)
[5/11/06 10:02:15:498 EDT] 24df24df SystemErr R at java.lang.NullPointerException.(NullPointerException.java:60)
[5/11/06 10:02:15:498 EDT] 24df24df SystemErr R at org.apache.ojb.broker.core.PersistenceBrokerImpl.getClassDescriptor(PersistenceBrokerImpl.java)
[5/11/06 10:02:15:498 EDT] 24df24df SystemErr R at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(QueryReferenceBroker.java)
[5/11/06 10:02:15:498 EDT] 24df24df SystemErr R at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(QueryReferenceBroker.java)
[5/11/06 10:02:15:508 EDT] 24df24df SystemErr R at org.apache.ojb.broker.core.QueryReferenceBroker.getCollectionByQuery(QueryReferenceBroker.java:253)
[5/11/06 10:02:15:508 EDT] 24df24df SystemErr R at org.apache.ojb.broker.core.PersistenceBrokerImpl.getCollectionByQuery(PersistenceBrokerImpl.java:1217)
[5/11/06 10:02:15:508 EDT] 24df24df SystemErr R at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(DelegatingPersistenceBroker.java:338)
[5/11/06 10:02:15:508 EDT] 24df24df SystemErr R at org.apache.ojb.broker.core.DelegatingPersistenceBroker.getCollectionByQuery(DelegatingPersistenceBroker.java:338)
Does anybody have a clue why this might happen very intermittently? Since, it is intermittent it is very hard to debug.
-Vamsi
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